$ErrorActionPreference = 'Stop'

$root = Split-Path -Parent $PSScriptRoot

function Read-RequiredFile([string]$relativePath) {
  $path = Join-Path $root $relativePath
  if (-not (Test-Path -LiteralPath $path -PathType Leaf)) {
    throw "AUTH-POST-COMMIT-NAVIGATION-CONTRACT BLOCKED`n- missing file: $relativePath"
  }
  return Get-Content -LiteralPath $path -Raw -Encoding UTF8
}

$issues = [System.Collections.Generic.List[string]]::new()
$a01 = Read-RequiredFile 'pages/auth/a01-entry.vue'
$a04 = Read-RequiredFile 'pages/auth/a04-register.vue'
$pages = Read-RequiredFile 'pages.json'

function Require-Text(
  [string]$content,
  [string]$expected,
  [string]$message
) {
  if (-not $content.Contains($expected)) {
    $script:issues.Add($message)
  }
}

function Require-Pattern(
  [string]$content,
  [string]$pattern,
  [string]$message
) {
  if ($content -notmatch $pattern) {
    $script:issues.Add($message)
  }
}

Require-Text -content $a01 -expected 'const authenticationCommitted = ref(false);' -message 'A01 must remember that remote authentication already committed'
Require-Text -content $a01 -expected 'const enterAuthenticatedRoot = async () =>' -message 'A01 must own a navigation-only retry after authentication commits'
Require-Text -content $a01 -expected 'authenticationCommitted.value = true;' -message 'A01 must mark the remote authentication result before navigation'
Require-Text -content $a01 -expected 'const authenticationNavigationFailure =' -message 'A01 must own a navigation-specific failure message'
Require-Pattern -content $a01 -pattern '(?s)if \(authenticationCommitted\.value\)\s*return enterAuthenticatedRoot\(\);' -message 'A01 repeated submit after commit must retry only the local navigation'
Require-Text -content $a01 -expected 'const opened = await goRoot("G01");' -message 'A01 must inspect the navigation gateway boolean result'
Require-Text -content $a01 -expected 'if (opened !== true)' -message 'A01 must treat a false navigation result as retryable failure'

Require-Text -content $a04 -expected 'const registrationCommitted = ref(false);' -message 'A04 must remember that the remote registration already committed'
Require-Text -content $a04 -expected 'const enterAuthenticatedRoot = async () =>' -message 'A04 must own a navigation-only retry after registration commits'
Require-Text -content $a04 -expected 'registrationCommitted.value = true;' -message 'A04 must mark the remote registration result before navigation'
Require-Text -content $a04 -expected 'const registrationNavigationFailure =' -message 'A04 must own a navigation-specific failure message'
Require-Pattern -content $a04 -pattern '(?s)if \(registrationCommitted\.value\)\s*return enterAuthenticatedRoot\(\);' -message 'A04 repeated submit after commit must retry only the local navigation'
Require-Pattern -content $a04 -pattern '(?s)await appApi\.registerWithPassword\([\s\S]*?registrationCommitted\.value = true;\s*\}\s*catch' -message 'A04 must establish the registration commit before leaving the remote-write catch'
Require-Pattern -content $a04 -pattern '(?s)\}\s*catch \(error\) \{[\s\S]*?\}\s*finally[\s\S]*?\}\s*if \(!pageActive\) return;\s*await enterAuthenticatedRoot\(\);' -message 'A04 navigation must execute after the registration failure boundary'
Require-Text -content $a04 -expected 'const opened = await goRoot("G01");' -message 'A04 must inspect the navigation gateway boolean result'
Require-Text -content $a04 -expected 'if (opened !== true)' -message 'A04 must treat a false navigation result as retryable failure'
Require-Pattern -content $a04 -pattern '(?s)const requestBack = \(\) =>\s*registrationCommitted\.value\s*\?\s*enterAuthenticatedRoot\(\)' -message 'A04 committed registration must not enter the unsaved discard flow'

Require-Pattern -content $pages -pattern '"navigationBarTextStyle"\s*:\s*"white"' -message 'custom red headers require light Android status-bar content'

if ($issues.Count -gt 0) {
  $lines = [System.Collections.Generic.List[string]]::new()
  $lines.Add('AUTH-POST-COMMIT-NAVIGATION-CONTRACT BLOCKED')
  foreach ($issue in $issues) {
    $lines.Add("- $issue")
  }
  throw ($lines -join [Environment]::NewLine)
}

Write-Output 'AUTH-POST-COMMIT-NAVIGATION-CONTRACT PASS'